Automatic shutter for moving-picture machines.



(L R. UEBELMESSEP. Awomfrm SHUTTBR fos MOVING PICTURE MACHINES.

APBLIGATlON FILED OGT.5,19O8.

Patented Oct. 8,

2 SHEETS-SHEET l.

otally supported on this spindle, slid ing collar 2li is loosely mounted noon the spindle 22 above the balance-Wheel. and i;

connected. with one side oit the latter b a i .l

`this shutter up ont ot the way when the inachine is in motion. The shutter is pivoted at 3l and has a cam member 32 projecting from one of its sides. is a slot in the cam member into which the lpin 28 projects.

.The parts above described are so proportioned and arranged that when al rest the Weight of the shutter 30 and the collar 24 and other connected parts will 'tilt the balance-wheel into tho position in which it is 'shown in the drawings. But as soon as the mechanism is operated to drive the tilm, the spindle 22 will be rotated and the balancewvheel, under the action ot centrifugal. torce, will tend to assume the position in which it is shown by dottedlines in Fig. 3. This, through the connections above described, will raise the shutter so that lwhen the machine attains its speed, the shutter Will be Wide open. When the machine is slowed down enough to injure the lihn, the Weight of the shutter Will overcome the effeet o centrifugal force and cause it to again drop down over the opening i6. By this Simple means, Without the use of springs l. fn a moving picture machine, a iiin di' 'ving i'ncciianisin, a self-closing protective shutter for the Film having a oani member til/einen, a tilting balance -wheel, and mechaoperatively connecting said balance Y and cani member arranged to canse the shutter to be automatically o )cned when the machine is in motion.

in a ii'ioi'ingj picture machine, a film driving` mecl'iai'iisni, tilting; baiance Wheel driien by-said tilin\ 'ving mechanism, protowive shatter ior the iihn having a projection provided with a cam slot7 and connections between said cani slot and Wheel, whereby the shutter is caused to be automatically opened when the machine is in motion.

3. l'n a moving picture machine, a film driving mechanism, a tilting' balance Wheel driven b v said film-driving mechanism, a protective shutter for the lni having a pro.- iection provided with a cam slot7 lever having a pin engaging said cam slot7 and connections between said lever and balance Wheel, whereby the shutter is caused to open "when the machine is in motion.

ln testimony Whereorn have signed my name to this specification inV the presence of tivo subscribing Witnesses. CHARLES UEBELMESSER.

Witnesses ELLA TUoii7 ERNEST lli/v. lli/lARsHALL. 

